baber/WOPTO huggingface dataset:
Patent GB-700129-A (GB)
Title: Improvements in electric loudspeaker amplifying systems
IPC: H03F1/36
Filed: 1951-07-27
Abstract: 700,129. Circuits for magnetic instruments. STANDARD TELEPHONES & CABLES, Ltd. July 27, 1951 [Aug. 2, 1950], No. 17856/51. Class 40 (4) [Also in Group XL (c)] In an arrangement, comprising an amplifier and a loudspeaker, the amplifier is :provided with frequency-dependent Voltage and current negative feedback which causes the output impedance to increase with frequency and thus improves the transient response of the loudspeaker. Voltage feedback is provided from the anode circuit of valve V2, Fig. 6, to the cathode of valve V1 by resistors R1, R2 and condenser C1, and current feedback is provided from the cathode of valve V2 to the grid of valve V1 by resistors R3; R4 and Condenser C3. The use of blocking condenser C2 which may have undesired effects is avoided in a modified circuit, Fig. 7 (not shown), wherein the voltage feedback is provided by a T- network between the two anodes. In a further modification, two amplifiers driving separate high and low frequency loudspeakers have current and voltage feedback provided to increase the output impedance of one amplifier and to decrease that of the other The Specification includes the design data for maintaining the gain of such an arrangement substantially independent of frequency.
Patent GB-372136-A (GB)
Title: Improvements relating to castors
IPC: B60B33/00
Filed: 1931-06-20
Abstract: 372,136. Castors. OWEN, H. A. W., Albion Works,. Dartmouth, Street, Birming- ham. June 20, 1931, No. 17927. [Class 52 (i).] An adjustable castor e, f, for a bed &c., has a plain shaft d carried by a vertical holder a secured to the bed &c. by clamps c. The shaft a is releasably clamped in the holder a by a cotter consisting of a bolt g and sleeve h forced together by a nut !edges of the bolt head and sleeve adjacent to the shaft being chamfered, as shown in Fig. 4.
Patent GB-546026-A (GB)
Title: Improvements in or relating to the manufacture of water-soluble salts of water-insoluble cellulose hydroxy fatty acid ethers, and of the corresponding cellulose hydroxy fatty acid ethers
IPC: C08B11/12
Filed: 1940-12-20
Abstract: 546,026. Cellulose ethers. HOUGHTON, A. A., LUCKHURST, K., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Dec. 20, 1940, No. 17932. [Class 2 (ii)] A water-insoluble cellulose hydroxy fatty acid is isolated from an etherification reaction mixture, which includes a water-soluble alkali metal salt of the cellulose ether in fibrous form and other products of the etherification reaction, by adding to the mixture an excess of an acid capable of liberating the cellulose hydroxy fatty acid, the concentration and amount of the acid being such that the fibrous condition of the cellulose ether is retained throughout its addition, if desired, with the assistance of a non- solvent water-miscible organic liquid, and then purifying the resultant fibrous cellulose hydroxy fatty acid by extracting it with water. The product may be converted into a water-soluble salt without losing its fibrous form by mixing it with a base or a salt of a volatile acid in the presence of a medium containing a sufficient proportion of a volatile organic water-miscible liquid, e.g. alcohol, which is not a solvent for the cellulose ether. Preparations which dissolve in water to form solutions of predetermined pH may be obtained by controlling the extent of conversion of the fibrous cellulose ether into its salts. When converting the ether into a watersoluble salt there may be added a larger quantity of base than that necessary for complete conversion, and the excess may be converted into another salt before evaporating the volatile organic medium. To minimize swelling of the fibrous alkali metal salt of the cellulose ether the etherification mixture may contain alkali metal chlorides, anhydrous sodium carbonate or sulphate, ethyl alcohol, or acetone. The acid used for liberating the cellulose hydroxy fatty acid in the etherification reaction mixture may be sulphuric, nitric, phosphoric, or hydrochloric acid. In the case of sulphuric acid, the concentration of the acid solution added may be 60-80 per cent. Such a concentration avoids swelling of the water-soluble salt due to water introduced with the acid and also avoids loss of the fibrous form of the cellulose carboxylic ether as the result of any excess sulphuric acid after the conversion is complete. The purified cellulose ether may be converted into a salt by a solution of sodium, potassium, or lithium hydroxide, carbonate, or acetate, or ammonia, ammonium carbonate or acetate. The watersoluble salts of the cellulose hydroxy fatty acids are useful as emulsifying or dispersing agents. The viscosity characteristics may be permanently reduced by heating the cellulose ethers in acid or salt form and in dissolved or undissolved state. For the production of cellulose glycollic acid the etherifying agent may be sodium chloracetate.
Patent GB-1534579-A (GB)
Title: Coupling and pipe assembly
IPC: E03F3/04
Filed: 1976-05-03
Abstract: 1534579 Pipes; pipe couplings AMSTED INDUSTRIES Inc 3 May 1976 [2 May 1975] 18009/76 Headings F2P and F2G A pipe portion suitable for a flexible coupling includes a fibre-reinforced elastomer layer 42, 44 wherein helically oriented fibres disposed at 45-75 degrees with respect to the axis and having an elastic modulus within the range 4À22 Î 10<5> Kg cm<-2> are set in an elastomer binder of material having an elastic modulus, at 100% elongation of at least 1À75 Kg cm<-2> and less than that of the fibres; a tensile strength of at least 21 Kg cm<-2> and a hardness as measured on a Shore A durometer of 15-90. The coupling is further characterized in having a wall thickness/diameter ratio of 0À006 D-0À09 D, where D is in the range 10 cm-50 cm; a column expansibility (i.e. circumferential strain per unit axial force per unit circumference) of at least 1À12 Î 10<-3> cm Kg<-1> and a transverse shear resistance of 0À12 cm of pipe deflection or less per cm of diameter under a shear load of 26À787 D Kg. As shown (Fig. 4) under an optional outer cover 40 is disposed a layer 42 of helically wound filaments in a matrix of elastomeric binder 43; a second filament layer 44 wound in an opposite sense to layer 42 is also imbedded in the matrix 43; the two filament layers preferably separated by a layer 50 (Fig. 5) of elastomeric (e.g. polyurethane) foam; and an innermost liner 47 of, e.g. thermoplastic or thermosetting material integral with or distinct from the inner filament layer 44, and defining an annular sealing lip 49 towards each axial end of the coupling. The fibres may be of steel, stainless steel, copper aluminium alloy, boron, graphite E-glass, C-glass, S-glass or aramid fibres and may be formed as filament, strand, roving, yard or cordage. The binder may be formed of a natural or synthetic polymeric elastomer, e.g. natural rubber, polybutadiene, polyether urethanes with or without further reinforcing fillers such as silica smoke or carbon black; preferably a plasticized reaction product of a polyester-urethane prepolymer and a triol curing compound is used which is also suitable for the liner layer. The invention extends to a coupling formed as above receiving two pipe ends and adhesively bonded thereto. The pipe ends may be roughened or grooved and auxiliary clamping means, e.g. reinforcing rings, clamps, may be included.
Patent GB-515328-A (GB)
Title: Improvements in and relating to portable flame cutting machines
IPC: B23K7/10
Filed: 1938-06-17
Abstract: 515,328. Dividing by fusion. PANZETTA, H. (Lawrence, J. T.). June 17, 1938, No. 18036.' [Class 83 (iv)] A portable flame cutting apparatus for cutting washers or holes in girders &c., comprises a base member on which are mounted a pair of synchronised rotating members or wheels co-operating with a movable torch holder so as to guide the torch along' any one of a number of predetermined circular paths on a base member 1, which may have a roughened underface or may be clamped to the work, is mounted a pair of synchronised wheels 2, 6, which are in mesh with a wheel 3 and are driven by a worm 5 operated by a handle 7. Removable adapters 22, 23 on the wheels 2, 4, may be provided with a number of agreeing apertures at different pitch circles. Into an appropriate pair of apertures are placed pegs 12 on a torch holder 9. The adapter 23 has index marks and the torch holder is provided with a notch 24 so that the operator may see the particular index mark. being used. The torch holder may be in two parts 10, 11, the part 10 carrying the pegs and the part 11 being angularly movable by a handle 13 so that the cut may start off the line of the arc. The part 11 carries a spring clip 14 and a screw clamp 15 for the torch, the tip of which projects over the downwardly bent end of the part 10 which protects the apparatus from the flame. The base member is upwardly bent at 16 for a similar purpose. The centre of the hole to be cut is marked and the base member adjusted by a removable pointer 17 engaging studs 18 on the base. The pointer is then removed and the torch holder applied in the required apertures and after the cut is started the part 11 is moved by the handle 13 to the required position and the cut is completed by rotation of the handle 7. The apertures in the adapters 22, 23 may be replaced by pegs or radially adjustable blocks may be used. The parts 22, 23 may be connected together by crank and link instead of by gears.
Patent GB-219170-A (GB)
Title: Improvements in or relating to tractor couplings
IPC: B60D1/167
Filed: 1923-07-12
Abstract: 219,170. Ashley, R. T. July 12, 1923. Couplings for tractors. - A coupling between a tractor and an implement includes a chain tension connection which allows freedom of movement laterally and a rigid reach bar which acts as a thrust member during backing and is then rigidly connected to the implement. A bar 1 secured to the tractor is pivotally connected to the reach bar 14, the rear end of which is connected by a pin and slot 26 to a bar 12 adapted to be secured to a trailer or agricultural implement by means of holes 13 in the bar or holes 10 in cleats 11. The chain or other flexible member 8 is secured at its ends to the cleats 11 and passes over sheaves 7 carried by housings 4 pivoted on the ends of the bar 1. The member 14 is in two parts connected by a bolt 17 which, during backward movement, engages one of a number of notches 29 in a sector fixed to the bar 12, with the object of facilitating shearing, the slot 26 allowing the necessary movement of the member 14 and the chain 8 then being slack. If it is desired to draw the implement in a position offset from the line of draught, the member 14 may be fixed to the sector in any position by means of a pin engaging holes 31.
Patent GB-898015-A (GB)
Title: Initiation and promotion of ionic reactions
IPC: B01J19/08
Filed: 1960-05-23
Abstract: An ionic chemical reaction is effected by radiation in the presence of a noble gas, said radiation comprising gamma, alpha or beta radiation or neutrons.  The reactions are thermodynamically unfavourable or do not proceed readily.ALSO:Methylcyclopentane is polymerized by gamma radiation in the presence of xenon.ALSO:Methane irradiated with gamma rays in the presence of xenon, argon or krypton yields a product containing hydrogen, ethane, propane, butane, isobutane and isobutene.  Propylene yields additionally 2,3-dimethyl butene and 2-methyl pentane.
Patent GB-434985-A (GB)
Title: Improvements in toothpastes
IPC: A61Q11/00
Filed: 1934-06-19
Abstract: 434,985. Dentifrices. POLLAK, J. E., 20, Holborn, London.-(Worcester Salt Co. ; 40, Worth Street, New York, U.S.A.) June 19, 1934, No. 18162. [Class 131] A tooth paste contains, in suspension, a substantial proportion of sodium chloride in crystalline form, the suspension being rendered stable by the addition of a colloid or of a concentrated suspension of finely divided substance such as magnesium hydroxide which may also contain a colloid such as gum tragacanth. A plasticizer such as glycerine or other polyhydric alcohol, an abrasive, and flavouring ingredients are also added. According to an example the paste contains glycerine, soap, gum tragacanth, magnesium carbonate, calcium carbonate, a concentrated aqueous suspension of magnesia, water, saccharin, crystalline sodium chloride, and a flavouring such as a mixture of menthol, methyl salicylate, safrol, and oils of peppermint, anise, eucalyptus and wintergreen.
Patent GB-497854-A (GB)
Title: Improvements in or relating to illuminated indicating apparatus
IPC: H03J1/04
Filed: 1937-06-30
Abstract: 497,854. Adjusting wireless apparatus; indicating-apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 30, 1937, No. 18214. Convention date, June 30, 1936. [Class 37] [Also in Group XIX] A multi-scale indicator, particularly for indicating the tuning in the different bands of a radio receiver, comprises an edge lighted transparent dial having a plurality of spaced scales thereon, and rotatable to bring the scales successively into operative position, the dial being provided with differently coloured edge portions, one to each scale or each of some of the scales, and serving to illuminate the appropriate scale in a distinctive colour when in the operative position. The transparent dial 10, Fig. 1, of glass, resinous material &c. has scales A ..... E arranged, as described in Specification 480,441, printed or etched &c. on the rear face thereof and corresponding edge portions A<1> .... E<1> differently coloured so that when the scales are selectively positioned behind the aperture 70, Fig. 2, in the escutcheon plate 68 they are correspondingly coloured by light from a lamp 18 reflected at 20 and passing edgewise into the dial, the inner edge 12a of which is silvered to enhance the illumination. The knob 44, Fig. 4, operating the wave range switch 46 rotates the dial 10 about axis 14 through links 42, 40, toothed sector 33 and pinion 32 rigid with the hub 30 of the dial which is accurately located in its operative positions by a roller 53 at the end of a spring biassed arm 55 engaging recesses a ... e in a cam 33 secured to the hub. The hub is cut away at 34 for the shaft 16 of the tuning indicating pointer 26 which is adjusted by rotating a knob 88, Fig. 4, on a shaft 78 rigid with a spool 76 the flanges of which frictionally drive a disc 84 on the tuning shaft 16 through balls 80, 81 housed in a frame 82. In a modification, Fig. 5 (not shown), the edge of the dial has spaced coloured arcuate recesses corresponding to the different scales, and the peripheral edge between the recesses is silvered to reflect the light internally. The inner peripheral edge of the dial also is silvered, and the entire coloured and silvered area may be roughened to diffuse the light. The scales on the dial may be rectilinear and coact with a pointer moved rectilinearly by a cord driven by the tuning shaft.
Patent GB-182338-A (GB)
Abstract: 182,338. Dodson, E. July 25, 1921. Timing.-In ignition-controlling arrangements of the type in which the suction effect of the engine is employed to advance the point of ignition against the action of gravity or a spring tending always to retard the ignition, the spring effect relative to the suction effect is made as sensitive at the open position of the throttle, when the charges of induction pressure are relatively slight, as at the partly-closed position when they increase in magnitude. For this purpose there may be employed a system of levers E4, G, F2, actuated by the movements of the engine throttle. The spring B3 exerts its efforts on the magneto through the lever B, pivoted at the point B2. The suction effect is exerted through the bellows C connected to the lever D, having a pivot D2. The rollers E carried by the toggle system E4, G, bear, in the closed position of the throttle against the lever B, close to its pivot B2, but against the lever D at a much greater distance from its pivot. As the throttle is opened the rollers E are moved, relatively, much farther from the fulcrum B2 than from the fulcrum D2 thus reducing the movement exerted by the spring when the suction pressure is relatively small. The link E4 is screw-threaded at one end for permitting adjustment, and separate rollers are used for the levers B, D, in order to reduce friction. A recess in the lever B is provided for positioning the roller at the closed position of the throttle.
Patent GB-894835-A (GB)
Title: Improvements in or relating to boxes, cartons and the like
Inventor: SHELDON-WILLIAMS CHARLES
IPC: B65D5/00
Filed: 1959-05-28
Abstract: 894,835. Cartons. REED CORRUGATED CASES Ltd. May 11, 1960 [May 28, 1959], No. 18253/59. Class 18. A carton, tray, &c. comprises a rectangular base 1 having triple thickness end walls 7 and side walls 5 hinged thereto, each of the walls 7 having pockets or slots 13, 12 which, when the walls 7 are erected, face respectively upwards and laterally thereof, the walls 3 having hinged tabs 4 adapted to engage in the pockets 12 and at least one side wall 3 having a hinged flap 5 adapted to extend over at least part of the top of the erected box and which has hinged tabs 6 to engage in the pockets 13. The carton is formed from the blank of Fig. 1 by folding wings 9 back beneath panels 11 which are then folded about fold lines 8 to lie on top of panels 12 and staples 11 are driven through each end wall 7. The walls 7 are folded to lie perpendicular to the base 1. The tabs 4 are inserted in the pockets 12 and the flaps 5 are folded over the top of the box and the tabs 6 inserted in the pockets 13. The flaps 5 may each extend over half the top of the box or only one flap may be provided to extend completely over the top of the box. In a modification, Fig. 3 (not shown), the wings 9 are extended and bent so that they can be secured by staples to the walls 7 to form a triangular section pocket.
Patent GB-896691-A (GB)
Title: Improvements in or relating to a transducer system and method
Inventor: RICHARDSON DONALD ELMER
IPC: G11B9/00
Filed: 1958-06-09
Abstract: 896,691. Electrostatic recording apparatus. ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY. June 9, 1958, No.18411/58. Class 40 (2). In a method of electrostatic recording on a thin dielectric carrier a modulated electric field of high intensity, greater than the threshold value where abrupt rise in charges flow to the carrier but less than the breakdown value of said carrier, injects charges into opposite surfaces of the carrier. In the embodiments described a thin polyester tape, preferably that known under the Registered Trade Mark " Mylar," is used as the carrier, and is driven from one spool 11, past an ion source 17, through a head assembly 13, and past an ion source 18 to a take-up spool 12. The head assembly 13 contains a pre-bias electrode 21, a record electrode 22, a backing electrode 23, capstan roller 25 and shiftable pinch roller 26. Between the electrodes 21, 22 is a guide member 27 having an annular recess therein to guide the record carrier. The backing electrode 23 comprises a number of thin parallel tungsten or nickel wires of the order of 0.001 inch in diameter, in order that the record carrier is held perfectly against the knife edges of the electrodes 21, 22 over the full width of the carrier. The mounting member 40 carrying the wires is mounted on an adjustable eccentric screw 45 on a plate 46, the position of which is itself adjustable by means of a screw 53 acting on a yoke 24 carrying the said plate 46, such adjustments enabling the backing electrode wires 23 to be adjusted to an optimum position. The plate 46 is further adjustable relative to the yoke 24 by a screw 49. A typical recording circuit is shown in Fig. 9, in which the recording signal is applied via a transformer 63, the secondary 65 of which includes in its circuit a D.C. biasing source 56. The resulting output is applied between the recording electrode 22 and earth, the electric circuit being completed through the backing electrode 23. The A.C. component is earthed through a condenser 61, but the D.C. component passes through the record carrier again to the pre-bias electrode 21 and earth. Thus the pre-bias applied through the record carrier is of opposite polarity to the bias applied with the signal through the recording electrode 22. Specification 896,692 is referred to.
Patent GB-1471404-A (GB)
Title: Reliquefaction of boil-off gas
IPC: F25J1/02
Filed: 1973-04-17
Abstract: 1471404 Liquefying boil-off gas PETROCARBON DEVELOPMENTS Ltd 20 June 1974 [17 April 1973 27 July 1973] 18484/73 and 35796/73 Heading F4P Reliquefaction of boil-off gas 30 from tank 2 is effected by first combining the boil-off gas 30 with refrigerant 32 and then heating the combined refrigerant at 20, 18 before compression at 8, 10 and cooling at 8, the refrigerant being then divided into a first refrigerant loop wherein refrigerant 40 is expanded at turbine 12 before recycling via lines 42, 34, 36 for recompression, and a second refrigerant loop wherein refrigerant 44 is cooled and condensed at 20 by the cold produced by the work-expansion of the first refrigerant at 12 and is thereafter sub-cooled at 22 before expansion through valve 14 to separator 16 from which vapour 52 is recycled for recompression at 8, 10, the cold for sub-cooling the second refrigerant at 22 and thus providing the cold for producing reliquefied gas 48 for return to tank 2 being caused by evaporation in exchanger 22 of liquefied gas tapped off from line 48 via line 50. In a further embodiment (Fig. 2, not shown), a part of the refrigerant compressed at 8 is directed to turbine 6 to drive compressor 8, and exchangers 18, 20 are replaced by a single exchanger with the division into first and second loops occurring at an intermediate point in this exchanger. Instead of boil-off gas being combined into the refrigerant, it can be reliquefied by heat exchange with a closed refrigerant circuit comprising the two loops, the refrigerant being, for example, N 2  (Figs. 3, 4, not shown).
Patent GB-140302-A (GB)
Title: Improvements in or relating to athletic boots and shoes
IPC: A43B5/00
Filed: 1919-07-25
Abstract: 140,302. Hartopp, J. J. July 25, 1919. Soles.-Rubber and like soles of shoes are provided with a non-slipping surface characterized by projections 1, 2, recesses, &c. unsymmetrical in form and promiscuously arranged so as not to form a defined pattern.
Patent GB-1483840-A (GB)
Title: Pharmaceutical preparation containing acetylsalicylic aci
IPC: A61K9/14
Filed: 1975-05-02
Abstract: 1483840 Pharmaceutical compositions containing acetylsalicylic acid E BAR-ON 2 May 1975 [6 May 1974] 18562/75 Heading A5B [Also in Division A2] A pharmaceutical composition, for oral ingestion after dissolution in a drinkable aqueous liquid, comprises acetylsalicylic acid, sufficient solubilising agent to dissolve the acetylsalicylic acid in the aqueous liquid and dry milk solids, the ratio of milk solids to acetylsalicylic acid being from 5:1 to 100:1 by weight. The solubilising agent is preferably a combination of a physiologically acceptable alkali metal carbonate and bicarbonate.
Patent GB-187561-A (GB)
Title: An improved construction of electrode for electric welding
IPC: B23K11/30
Filed: 1921-05-18
Abstract: 187,561. White, A. E., (Elyria Iron & Steel Co.). May 18, 1921. Welding.-In electric butt - welding apparatus with roller electrodes, the electrode is formed with a cylindrical enlargement or hub upon which a large number of brushes, set obliquely in an annular encircling brush holder, bear. The brush holder is adjustable relatively to the hub. Copper conductors 179 are bolted to copper annular brush holders 180 which are concentric with the hubs 181 of welding rolls 149, 150. Flexible copper brushes 182 are swaged into oblique slots in the inner periphery of the holders. Vertical adjustment of the holders 180 is obtained by shifting the securing bolts 183 in slots in the conductors 179.